There is some information out there to suggest that synthetic oil will reduce fuel mileage. If memory services me correctly it's due to some kind of temporary shearing of the oil in the bearings that occurs more with conventional oil.
Honestly, you can't make this stuff up.
Some fleet management noticed this. I also read an article about this from ...Lubrizal maybe?????
https://www.government-fleet.com/146789/mythbusters-fleet-edition
here is the article...look at disadvantages of synthetic oil
https://www.machinerylubrication.com/synthetic-oil-31800
Honestly, you can't make this stuff up.
Some fleet management noticed this. I also read an article about this from ...Lubrizal maybe?????
https://www.government-fleet.com/146789/mythbusters-fleet-edition
here is the article...look at disadvantages of synthetic oil
https://www.machinerylubrication.com/synthetic-oil-31800
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